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Grok 4.5 vs Llama 3.1 405B (reasoning)

Compare Grok 4.5 from Grok and Llama 3.1 405B (reasoning) from Llama on key metrics including benchmarks, price, context length, and other model features. Access both models and hundreds of others through the AIHubMix API.

GrokGrok 4.5LlamaLlama 3.1 405B (reasoning)
Grok logo
Grok 4.5
Grok · text, image → text

Grok 4.5 was trained on datasets spanning knowledge in coding, science, engineering, and math. With both intelligent and efficient reasoning, Grok 4.5 excels at real engineering tasks and exceeds comparable leading models at these tasks.

Input$2 /M
Output$6 /M
Cache read$0.5 /M
Llama logo
Llama 3.1 405B (reasoning)
Llama · → text

Input$4 /M
Output$4 /M

Pricing & Specifications

Prices are per million tokens. Time to First Token and throughput are rolling averages measured on AIHubMix.

Grok 4.5
Llama 3.1 405B (reasoning)
Input /M
$2
$4
Output /M
$6
$4
Cache read /M
$0.5
-
Context length
500,000
0
Max output
500,000
0
Time to First Token
4.4 s
-
Throughput
34.2 tok/s
-
Modalities
textimage
Supported Parameters
thinkingtoolsfunction callingstructured outputslong context
API Formats
Released
July 2026
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Promotional prices show the discounted rate; see each model page for promotion windows.

Activity Past 30 Days

Daily traffic served through AIHubMix — how demand for each model is trending.

grok-4.5llama-3.1-405b-reasoning

Tokens / day

-

Requests / day

-

Performance Past 3 Days

Measured on real AIHubMix traffic, hourly buckets. Gaps mean no traffic in that hour.

grok-4.5llama-3.1-405b-reasoning

Throughput (tok/s)

-

TTFT (s)

-

Uptime (%)

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LMArena Benchmarks

LMArena ratings by capability (Bradley-Terry, commonly called Elo). Higher is better.

Text
grok-4.5llama-3.1-405b-reasoning
1280136014401520
Overall
13351471
Coding
13751523
Math
13151479
Hard prompts
13411495
Instruction following
13131466
Multi-turn
13391476
Creative writing
13011451
Longer query
13261487
Chinese
13211512
English
13601476

Source: LMArena (arena.ai) leaderboard, imported by AIHubMix. Models without published ratings are omitted per chart.

Cost calculator

Estimate your monthly bill for the same workload on each model.

Grok 4.5
$210 /mo
Llama 3.1 405B (reasoning)
$300 /mo

Monthly = daily × 30. Discounted rates applied where a promotion is active.

FAQ

Which is cheaper: Grok 4.5, Llama 3.1 405B (reasoning)?

Llama 3.1 405B (reasoning): $4/M output tokens; Grok 4.5: $6/M. Use the cost calculator above to estimate your own workload.

How do their coding arena scores compare?

Grok 4.5: 1523; Llama 3.1 405B (reasoning): 1375 (LMArena coding leaderboard).

Can I call Grok 4.5 and Llama 3.1 405B (reasoning) with the same API key?

Yes. AIHubMix serves every model on this page behind one OpenAI-compatible endpoint, so switching between them is a one-line change to the model field — no second account, key or SDK.

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